11 networking basics chapter 1. chapter 1: networking basics2 lans, wans, and mans three main...
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11
NETWORKING BASICS
Chapter 1
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Chapter 1: NETWORKING BASICS 2
LANS, WANS, AND MANS
Three main networking technologies are used to connect computers and networks together: Local area network (LAN)
Wide area network (WAN)
Metropolitan area network (MAN)
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Chapter 1: NETWORKING BASICS 3
LAN
Used to network computers located in a limited geographical area such as a room, floor, or building
Has three main attributes Topology: bus, star, and ring
Medium: copper, fiber, and wireless
Protocols
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Chapter 1: NETWORKING BASICS 4
EXAMPLE OF A LAN
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Chapter 1: NETWORKING BASICS 5
WAN
Spans a large geographic area
Defined as an internetwork (private or public) that connects many LANs
Uses routers and usually point-to-point links
Examples of WANs The Internet
Private global enterprise networks
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Chapter 1: NETWORKING BASICS 6
EXAMPLE OF A WAN
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Chapter 1: NETWORKING BASICS 7
PROTOCOLS AND SERVICES
Facilitate communication between two networked devices
Perform data encapsulation
Provide a common language to communicating devices
Provide either connectionless or connection-oriented services
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Chapter 1: NETWORKING BASICS 8
CONNECTIONLESS VS. CONNECTION-ORIENTED
Connectionless protocols Do not require a connection
Have very little overhead
Are fast and unreliable
Connection-oriented protocols Require a connection
Require more overhead
Are slower and very reliable
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Chapter 1: NETWORKING BASICS 9
PHYSICAL LAYER TRANSMISSION
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Chapter 1: NETWORKING BASICS 10
NETWORK LAYER ADDRESSING
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Chapter 1: NETWORKING BASICS 11
ROUTING
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Chapter 1: NETWORKING BASICS 12
SUMMARY
LANs, WANs, and MANs allow groups of computers to share information.
Signaling protocols are used to transmit data as 1s and 0s.
Protocols provide a common language for communication hosts.